Apparatus for dressing rolls



(No Model.) sheets-Sheet 1.

G. MESTA.

APPARATUS FOR DRESSING ROLLS.

. Patented May 16,1893.

III I .l

WITNESSES (No Model.) 3 SheetsSheet 2. MESTA. APPARATUS FOR DRESSINGROLLS.

3 9 8 1 6| 1 y m d av b n e t a P 0 O 7 9 4 O O n N O O A WITNESSES :7.WQ A m Noam PEYLRS co. PHOYU-LITHO., wlsnwsroa. n cy (No Model.) 3Sheets-Sheet 3.

G. MBSTA.

APPARATUS FOR DRESSING ROLLS. No. 497,500. Patented May 16, 1893.

WITNESSES I INVENTOR t tsn STATE 1 PATENT OFFICE.

GEORGE MESTA, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOR DRESSING ROLLS.-

SPECIFICATION forming part of Letters Patent N 0. 497,500, dated May 16,1893.

Serial No; 460,355- (No model.)

T0 00% whom it may concern.-

Beit known that I, GEORGE MESTA, of Pittsburg, in the county ofAllegheny and State of- Pennsylvania, have invented a new and usefulImprovement in Apparatus for Dressing Rolls, of which the following is afull, clear, and exact description. A

p I shall describe my improvement with reference to the accompanyingdrawings, t in which- Figure 1 is a plan view of a part of arolllng-mill plant, provided with my improvement. Fig. 2 shows in endelevation the supplemental engine constituting part of my invention; andFig. 3 shows the same in side elevation. Figs. 2 and 3 are made on alarger scale than Fig. 1.

In rolling-mill plants,espeoially those adapted for rolling thinsheet-metal, such as the material used in making tin plate, it isfrequently necessary to dress the peripheries of the rolls by means ofcutting tools, such as those used in lathes. For this purpose it isnecessary that the rolls undergoing the operation of dressing be drivenat a low rate of speed, and heretofore it has been common practice toemploy the usual main engine for so driving the rolls, operating it Veryslowly, and generally using a special train of gearing for securing thenecessary reduction of speed. The practical difficulty of this mode ofoperation is that during the dressing of the rolls at one side of theengine all the rolls connected with that engineon both sides must bestopped, and the delay in the operation of the mill thus pccasioned isthe source of very considerable oss.

The object of my invention is to overcome the difliculties pointed outabove, andto this end it consists in provided the rolls with asupplemental driving-engine so geared as to transmit a slow motion, andarranging this engine so that it may be put into gear and disconnectedfrom the rolls as desired.

It also consists in providing the rolls with such supplemental enginewhen vthe same is portable and is adapted to be shifted from one side ofthe rolls to the other.

The advantages of my invention arethat by its use I am enabled to turnand dress the rolls of one part of the plant without stopping theoperation of the other rolls.

Referring now to the drawings, 2 represents a line of plate rolls andtheir housings set at one side of a usual driving engine 3, coupledthereto-by a crab 4, and provided with usual coupling boxes and spindlesbetween the housings. I also show, at the left end of'Fi 1, a secondcrab 4 connecting the engine with anothersimilar line of rolls, notshown. The

engine B employed for driving the rolls during the dressing operation isshown in Figs. 2 and 3. It may be of suitable type, having areciprocating piston, and gearing 5, 6, '7, 8, 9, set in theengine-frame and connecting it with the transmitting wheel 10, which isprovided with a crab 11, adapting it to be mechanically connected withthe neck of one of the rolls to be driven. The engine is set on its bedso that it can be lifted as a whole and transported from place to placeby means of a crane or other suitable lifting and carrying device. Whenso lifted it is adapted to be set upon the shoes 12 of the roll-housingat the end of the line of rolls, and its bed is so shaped that it mayfit on the shoes and may be secured detachably thereto by means of boltsor other securing devices 13. I

When it isdesired to dress the rolls at either side of the mill, theengine B is set at the end of that line of rolls, on the housing-shoesof the end rolls, as 'shown'in Fig.1, and is connected by the crabto'the neck of the adjacent roll. The driving-engine being thenuncoupled from" that line of rolls, they may be rotated by the engine Bat the required slowrate of speed without interfering with the operationof the other rolls of the mill, which may be driven by the mainroll-driving englue and operated in the usual manner. If it be desiredto dress any one or more of the sets of rolls without the others, theother rolls of the same line on the side next the drivingengine maybeuncoupled therefrom and the rolls in question driven without operatingthe wholeline. At the end of the roll-dressing operation, thesupplemental engine may be uncoupled from the rolls, and may, ifdesired, be lifted to another part of the mill.

Within the scope of the broad claim of this application it is possibleto use, instead of the ably connected by overhead shatting and beltswith the said portable gearing.

I claim as new 1. In a rolling-mill plant, the combination of the rolls,a main driving-engine, a second engine, and a set of slow-speed gearingdetachably connecting the second engine with the rolls; substantially asand for the purposes described.

2. In a rolling-mill plant, the combination of the rolls, a maindriving-engine, and a supplemental engine provided on its frame withslow-speed gearing having a detachable connection enabling it to becoupled with the rolls; substantially as and for the purposes described.

3. In a rolling-mill plant, the combination of the rolls, a maindriving-engine, and a supplemental engine provided on its frame withslow-speed gearing having a detachable connection enabling it to becoupled with the rolls, said supplement-a1 engine being portable andhaving a bed adapted to be fitted detachably to the housing-shoes;substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 25th day ofOctober, A.D. 1892.

GEO. MESTA. VYitnesses:

T. W. BAKEWELL, W. B. OoRWIN.

